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Thread: Hummer 12 bolt beadlock ?

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    Colonel ClarkeF's Avatar
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    Default RE: five point nuts

    Aboonsky,

    the penta-nuts were a "brilliant" invention to keep the troops from disassembling the two-piece wheels when there are air-inside them which could cause injury as they are under considerable pressure. If you want my recommendation, I'd get rid of the penta-nuts and replace them with the current issue six-sided nuts. Your not going to like the price of the impact socket - it's well over a hundred from the dealers. Best chance would be to buy the replacement nuts (AMG PN EC12339501) and see if you can borrow a Penta-nut socket to get the old ones off.

    http://www.bluehummer.com/pentasocket.html - has a "loaner" program if you buy the new nuts from him.

    Cheers,

    Clarke

  2. #12
    Colonel ClarkeF's Avatar
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    Default RE: five point nuts

    P.S. the "early" wheels with the Penta nut sockets are probably the lower GVWR parts without the centering hole. As long as you aren't loading up tons of armor they will be fine. Dave also sell the necessary o-rings you need.

    Cheers,

    Clarke

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    frank8003 (08-17-2019)

  4. #13
    2 Star General aboonski's Avatar
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    Default Thanks for the useable information!

    I'll be calling to order the replacement nuts and to see about the loaner program for the penta-socket. I thought about making a socket out of a surplus six point impact socket. It would only be used once to pull the penta nuts off anyway. I am just worried about the water inside the rims right now. The two I managed to pull apart had already started rusting where the two parts join so I will have to beadblast the rusted areas out at the Patrick AFB auto hobby shop. I wanted to post a picture or two of the nuts that were on the two rims that I took apart so here goes. Once again, thanks for the info!

    Al Broadbent
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    Default RE: Thanks for the useable information!

    I've never seen them assembled with plain nuts and washers. The original was 6 point stover locking flanged grade 8 nut. Egay has some stainless sets available.

  6. #15
    2 Star General aboonski's Avatar
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    Default replacement nuts

    I have ordered 36 replacement nuts and the loaner Penta socket from www.bluehummer.com for the three rims with the penta nuts on them. I may go on and change out the nuts and washers on the other two rims which have the nut and washer deal that you see in the photo. The two rims with this hardware also have regular vehicle valve stems that I might need to convert back to standard H1 fittings that will accept the ANG valves for use on my M1008A1 CUCV. Once I get the other three rims apart I hope to find beadlocks or runflats inside but will not know until I receive the penta socket. For some reason I have actually seen other vehicles with H1 rims that had these washers and nuts on them so they must be a modification made by the military. The washers have "TSI" and "1/2" stamped into them and the nuts have weird marks stamped into them so this hardware is not common Home Depot issue. Anybody else seen this before?

  7. #16
    4 Star General ken's Avatar
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    I had to drag up this old thread because it was all I could find on the 5 point penta nuts. Does anyone know what size 5 point socket is needed on the old rims?
    Kenny
    1966 M35A2C
    1986 M105
    1952 M37
    1966 M101
    1986 M1028A1
    1988 M101
    1993 M998
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  8. #17
    4 Star General ken's Avatar
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    Ok after a couple of days of research I found out they are 3/4. The nut size 1/2-20 thread. Hope this helps anyone looking in the future
    Kenny
    1966 M35A2C
    1986 M105
    1952 M37
    1966 M101
    1986 M1028A1
    1988 M101
    1993 M998
    MEP003
    MEP002

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    I asked the local PG&E guy for a penta-nut socket because they use them on their underground utilities covers and he just gave me one........... You might ask at the local fire station too. Some hydrants used 5 sided wrenches to remove covers.
    Last edited by papakb; 08-14-2019 at 22:25.

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    ken (08-15-2019)

  11. #19
    4 Star General ken's Avatar
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    Thanks, Those sockets are pretty pricey. Between $175 and $250. I ended up using a 19mm deep well impact socket from harbor freight. It was $3.99. I used a mini sledge hammer to drive it on. It was a pretty tight fit. Then a break over bar and got them off. Fastenal has the nuts in the regular 6 side for 86 cents each.
    Kenny
    1966 M35A2C
    1986 M105
    1952 M37
    1966 M101
    1986 M1028A1
    1988 M101
    1993 M998
    MEP003
    MEP002

  12. #20
    3 Star General TOBASH's Avatar
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    Why not just use a drill at the junction b/t the bolt and the 5 star nut?

    That's how I remove rust frozen bolts.

    Fast, no special tools, and then easy to replace with new nuts and bolts.
    T.O.B.A.S.H - When we feel frustrated with those around us. LOL


    The Great Wall of China is regarded as one of the Seven Wonders of the World. What is wrong with The Greatest Country in The World building its own???

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